science

Nepicastat

Nepicastat is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Nepicastat rather than just read about it. In short: Nepicastat (INNTooltip International Nonproprietary Name; developmental code names SYN117, RS-25560-197) is an inhibitor of dopamine β-hydroxylase (DBH), an enzyme that catalyzes the conversion of dopamine to norepinephrine. It has been studied as a possible treatment for congestive heart failure, and appears to be well tolerated as such.

Key takeaways

Nepicastat belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Nepicastat to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Nepicastat from memory before moving on to harder problems.

Reference excerpt

Nepicastat (INNTooltip International Nonproprietary Name; developmental code names SYN117, RS-25560-197) is an inhibitor of dopamine β-hydroxylase (DBH), an enzyme that catalyzes the conversion of dopamine to norepinephrine. It has been studied as a possible treatment for congestive heart failure, and appears to be well tolerated as such. As of 2012, clinical trials to assess nepicastat as a treatment for post-traumatic stress disorder (PTSD) and cocaine dependence have been completed. In Phase 2 study treatment with nepicastat was not effective in relieving PTSD-associated symptoms when compared to placebo. The study was funded by the U.S. Department of Defense. As of October 2024, development has been discontinued for most indications. Mice lacking epinephrine exhibit reduced contextual memory after fear conditioning . In addition, in PTSD epinephrine enhances traumatic contextual memory. Studies indicate that nepicastat effectively reduces norepinephrine in both peripheral and central tissues in rats and dogs. Nepicastat also upregulates the transcription Npas4 and Bdnf genes in the mice hippocampus potentially contributing to neuronal regulation and the attenuation of traumatic contextual memories No DBH inhibitor has received marketing approval due to poor DBH selectivity, low potency and side effects, however DBH gene silencing may be an alternative for patients with heightened sympathetic activity. Some studies, however have shown that nepicastat is well-tolerated in healthy adults and no significant differences in adverse events were observed. Given that nepicastat treatment has been proven to be effective in reducing signs in an PTSD mouse model with increased catecholamine levels, it could be a promising treatment option for humans with PTSD characterized by increased catecholamine plasma levels.

See also Disulfiram Etamicastat Zamicastat

References

Illustrations

Worked examples

Example 1 — a first encounter with Nepicastat

Start with the simplest possible case. Write down what Nepicastat claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Nepicastat before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Nepicastat ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Nepicastat

In research: Nepicastat appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Nepicastat in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Nepicastat is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2-Aminotetralins, Abandoned drugs, Dopamine beta hydroxylase inhibitors, so understanding it makes those chapters shorter.
In everyday life: Look for Nepicastat outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Nepicastat in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nepicastat means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Nepicastat out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nepicastat in simple terms?

Why does Nepicastat matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Nepicastat?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Nepicastat.